884 lines
20 KiB
Go
884 lines
20 KiB
Go
package recorder
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import (
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"bytes"
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"fmt"
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"time"
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rtspformat "github.com/bluenviron/gortsplib/v4/pkg/format"
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"github.com/bluenviron/mediacommon/pkg/codecs/ac3"
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"github.com/bluenviron/mediacommon/pkg/codecs/av1"
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"github.com/bluenviron/mediacommon/pkg/codecs/g711"
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"github.com/bluenviron/mediacommon/pkg/codecs/h264"
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"github.com/bluenviron/mediacommon/pkg/codecs/h265"
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"github.com/bluenviron/mediacommon/pkg/codecs/jpeg"
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"github.com/bluenviron/mediacommon/pkg/codecs/mpeg1audio"
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"github.com/bluenviron/mediacommon/pkg/codecs/mpeg4audio"
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"github.com/bluenviron/mediacommon/pkg/codecs/mpeg4video"
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"github.com/bluenviron/mediacommon/pkg/codecs/opus"
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"github.com/bluenviron/mediacommon/pkg/codecs/vp9"
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"github.com/bluenviron/mediacommon/pkg/formats/fmp4"
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"github.com/bluenviron/mediamtx/internal/defs"
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"github.com/bluenviron/mediamtx/internal/formatprocessor"
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"github.com/bluenviron/mediamtx/internal/logger"
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"github.com/bluenviron/mediamtx/internal/unit"
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)
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func mpeg1audioChannelCount(cm mpeg1audio.ChannelMode) int {
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switch cm {
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case mpeg1audio.ChannelModeStereo,
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mpeg1audio.ChannelModeJointStereo,
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mpeg1audio.ChannelModeDualChannel:
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return 2
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default:
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return 1
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}
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}
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func jpegExtractSize(image []byte) (int, int, error) {
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l := len(image)
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if l < 2 || image[0] != 0xFF || image[1] != jpeg.MarkerStartOfImage {
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return 0, 0, fmt.Errorf("invalid header")
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}
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image = image[2:]
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for {
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if len(image) < 2 {
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return 0, 0, fmt.Errorf("not enough bits")
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}
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h0, h1 := image[0], image[1]
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image = image[2:]
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if h0 != 0xFF {
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return 0, 0, fmt.Errorf("invalid image")
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}
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switch h1 {
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case 0xE0, 0xE1, 0xE2, // JFIF
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jpeg.MarkerDefineHuffmanTable,
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jpeg.MarkerComment,
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jpeg.MarkerDefineQuantizationTable,
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jpeg.MarkerDefineRestartInterval:
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mlen := int(image[0])<<8 | int(image[1])
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if len(image) < mlen {
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return 0, 0, fmt.Errorf("not enough bits")
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}
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image = image[mlen:]
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case jpeg.MarkerStartOfFrame1:
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mlen := int(image[0])<<8 | int(image[1])
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if len(image) < mlen {
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return 0, 0, fmt.Errorf("not enough bits")
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}
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var sof jpeg.StartOfFrame1
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err := sof.Unmarshal(image[2:mlen])
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if err != nil {
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return 0, 0, err
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}
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return sof.Width, sof.Height, nil
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case jpeg.MarkerStartOfScan:
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return 0, 0, fmt.Errorf("SOF not found")
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default:
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return 0, 0, fmt.Errorf("unknown marker: 0x%.2x", h1)
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}
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}
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}
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type formatFMP4 struct {
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ai *recorderInstance
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tracks []*formatFMP4Track
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hasVideo bool
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currentSegment *formatFMP4Segment
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nextSequenceNumber uint32
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}
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func (f *formatFMP4) initialize() {
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nextID := 1
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var setuppedFormats []rtspformat.Format
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setuppedFormatsMap := make(map[rtspformat.Format]struct{})
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addTrack := func(format rtspformat.Format, codec fmp4.Codec) *formatFMP4Track {
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initTrack := &fmp4.InitTrack{
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TimeScale: uint32(format.ClockRate()),
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Codec: codec,
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}
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initTrack.ID = nextID
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nextID++
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track := &formatFMP4Track{
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f: f,
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initTrack: initTrack,
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}
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f.tracks = append(f.tracks, track)
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setuppedFormats = append(setuppedFormats, format)
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setuppedFormatsMap[format] = struct{}{}
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return track
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}
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updateCodecs := func() {
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// if codec parameters have been updated,
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// and current segment has already written codec parameters on disk,
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// close current segment.
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if f.currentSegment != nil && f.currentSegment.fi != nil {
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f.currentSegment.close() //nolint:errcheck
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f.currentSegment = nil
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}
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}
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for _, media := range f.ai.agent.Stream.Desc().Medias {
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for _, forma := range media.Formats {
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clockRate := forma.ClockRate()
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switch forma := forma.(type) {
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case *rtspformat.AV1:
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codec := &fmp4.CodecAV1{
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SequenceHeader: formatprocessor.AV1DefaultSequenceHeader,
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}
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track := addTrack(forma, codec)
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firstReceived := false
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f.ai.agent.Stream.AddReader(
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f.ai,
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media,
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forma,
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func(u unit.Unit) error {
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tunit := u.(*unit.AV1)
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if tunit.TU == nil {
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return nil
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}
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randomAccess := false
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for _, obu := range tunit.TU {
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var h av1.OBUHeader
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err := h.Unmarshal(obu)
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if err != nil {
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return err
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}
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if h.Type == av1.OBUTypeSequenceHeader {
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if !bytes.Equal(codec.SequenceHeader, obu) {
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codec.SequenceHeader = obu
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updateCodecs()
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}
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randomAccess = true
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}
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}
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if !firstReceived {
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if !randomAccess {
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return nil
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}
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firstReceived = true
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}
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sampl, err := fmp4.NewPartSampleAV1(
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randomAccess,
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tunit.TU)
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if err != nil {
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return err
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}
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return track.write(&sample{
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PartSample: sampl,
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dts: tunit.PTS,
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ntp: tunit.NTP,
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})
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})
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case *rtspformat.VP9:
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codec := &fmp4.CodecVP9{
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Width: 1280,
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Height: 720,
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Profile: 1,
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BitDepth: 8,
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ChromaSubsampling: 1,
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ColorRange: false,
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}
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track := addTrack(forma, codec)
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firstReceived := false
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f.ai.agent.Stream.AddReader(
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f.ai,
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media,
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forma,
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func(u unit.Unit) error {
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tunit := u.(*unit.VP9)
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if tunit.Frame == nil {
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return nil
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}
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var h vp9.Header
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err := h.Unmarshal(tunit.Frame)
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if err != nil {
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return err
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}
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randomAccess := false
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if !h.NonKeyFrame {
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randomAccess = true
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if w := h.Width(); codec.Width != w {
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codec.Width = w
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updateCodecs()
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}
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if h := h.Width(); codec.Height != h {
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codec.Height = h
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updateCodecs()
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}
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if codec.Profile != h.Profile {
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codec.Profile = h.Profile
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updateCodecs()
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}
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if codec.BitDepth != h.ColorConfig.BitDepth {
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codec.BitDepth = h.ColorConfig.BitDepth
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updateCodecs()
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}
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if c := h.ChromaSubsampling(); codec.ChromaSubsampling != c {
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codec.ChromaSubsampling = c
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updateCodecs()
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}
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if codec.ColorRange != h.ColorConfig.ColorRange {
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codec.ColorRange = h.ColorConfig.ColorRange
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updateCodecs()
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}
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}
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if !firstReceived {
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if !randomAccess {
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return nil
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}
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firstReceived = true
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}
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return track.write(&sample{
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PartSample: &fmp4.PartSample{
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IsNonSyncSample: !randomAccess,
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Payload: tunit.Frame,
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},
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dts: tunit.PTS,
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ntp: tunit.NTP,
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})
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})
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case *rtspformat.VP8:
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// TODO
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case *rtspformat.H265:
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vps, sps, pps := forma.SafeParams()
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if vps == nil || sps == nil || pps == nil {
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vps = formatprocessor.H265DefaultVPS
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sps = formatprocessor.H265DefaultSPS
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pps = formatprocessor.H265DefaultPPS
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}
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codec := &fmp4.CodecH265{
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VPS: vps,
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SPS: sps,
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PPS: pps,
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}
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track := addTrack(forma, codec)
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var dtsExtractor *h265.DTSExtractor2
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f.ai.agent.Stream.AddReader(
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f.ai,
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media,
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forma,
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func(u unit.Unit) error {
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tunit := u.(*unit.H265)
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if tunit.AU == nil {
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return nil
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}
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randomAccess := false
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for _, nalu := range tunit.AU {
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typ := h265.NALUType((nalu[0] >> 1) & 0b111111)
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switch typ {
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case h265.NALUType_VPS_NUT:
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if !bytes.Equal(codec.VPS, nalu) {
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codec.VPS = nalu
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updateCodecs()
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}
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case h265.NALUType_SPS_NUT:
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if !bytes.Equal(codec.SPS, nalu) {
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codec.SPS = nalu
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updateCodecs()
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}
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case h265.NALUType_PPS_NUT:
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if !bytes.Equal(codec.PPS, nalu) {
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codec.PPS = nalu
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updateCodecs()
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}
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case h265.NALUType_IDR_W_RADL, h265.NALUType_IDR_N_LP, h265.NALUType_CRA_NUT:
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randomAccess = true
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}
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}
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if dtsExtractor == nil {
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if !randomAccess {
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return nil
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}
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dtsExtractor = h265.NewDTSExtractor2()
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}
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dts, err := dtsExtractor.Extract(tunit.AU, tunit.PTS)
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if err != nil {
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return err
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}
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sampl, err := fmp4.NewPartSampleH26x(
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int32(tunit.PTS-dts),
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randomAccess,
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tunit.AU)
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if err != nil {
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return err
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}
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return track.write(&sample{
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PartSample: sampl,
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dts: dts,
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ntp: tunit.NTP,
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})
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})
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case *rtspformat.H264:
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sps, pps := forma.SafeParams()
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if sps == nil || pps == nil {
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sps = formatprocessor.H264DefaultSPS
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pps = formatprocessor.H264DefaultPPS
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}
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codec := &fmp4.CodecH264{
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SPS: sps,
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PPS: pps,
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}
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track := addTrack(forma, codec)
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var dtsExtractor *h264.DTSExtractor2
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f.ai.agent.Stream.AddReader(
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f.ai,
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media,
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forma,
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func(u unit.Unit) error {
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tunit := u.(*unit.H264)
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if tunit.AU == nil {
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return nil
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}
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randomAccess := false
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for _, nalu := range tunit.AU {
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typ := h264.NALUType(nalu[0] & 0x1F)
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switch typ {
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case h264.NALUTypeSPS:
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if !bytes.Equal(codec.SPS, nalu) {
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codec.SPS = nalu
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updateCodecs()
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}
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case h264.NALUTypePPS:
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if !bytes.Equal(codec.PPS, nalu) {
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codec.PPS = nalu
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updateCodecs()
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}
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case h264.NALUTypeIDR:
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randomAccess = true
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}
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}
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if dtsExtractor == nil {
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if !randomAccess {
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return nil
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}
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dtsExtractor = h264.NewDTSExtractor2()
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}
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dts, err := dtsExtractor.Extract(tunit.AU, tunit.PTS)
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if err != nil {
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return err
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}
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sampl, err := fmp4.NewPartSampleH26x(
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int32(tunit.PTS-dts),
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randomAccess,
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tunit.AU)
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if err != nil {
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return err
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}
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return track.write(&sample{
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PartSample: sampl,
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dts: dts,
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ntp: tunit.NTP,
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})
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})
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case *rtspformat.MPEG4Video:
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config := forma.SafeParams()
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if config == nil {
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config = formatprocessor.MPEG4VideoDefaultConfig
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}
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codec := &fmp4.CodecMPEG4Video{
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Config: config,
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}
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track := addTrack(forma, codec)
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firstReceived := false
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var lastPTS int64
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f.ai.agent.Stream.AddReader(
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f.ai,
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media,
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forma,
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func(u unit.Unit) error {
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tunit := u.(*unit.MPEG4Video)
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if tunit.Frame == nil {
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return nil
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}
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randomAccess := bytes.Contains(tunit.Frame, []byte{0, 0, 1, byte(mpeg4video.GroupOfVOPStartCode)})
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if bytes.HasPrefix(tunit.Frame, []byte{0, 0, 1, byte(mpeg4video.VisualObjectSequenceStartCode)}) {
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end := bytes.Index(tunit.Frame[4:], []byte{0, 0, 1, byte(mpeg4video.GroupOfVOPStartCode)})
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if end >= 0 {
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config := tunit.Frame[:end+4]
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if !bytes.Equal(codec.Config, config) {
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codec.Config = config
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updateCodecs()
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}
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}
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}
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if !firstReceived {
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if !randomAccess {
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return nil
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}
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firstReceived = true
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} else if tunit.PTS < lastPTS {
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return fmt.Errorf("MPEG-4 Video streams with B-frames are not supported (yet)")
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}
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lastPTS = tunit.PTS
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return track.write(&sample{
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PartSample: &fmp4.PartSample{
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Payload: tunit.Frame,
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IsNonSyncSample: !randomAccess,
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},
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dts: tunit.PTS,
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ntp: tunit.NTP,
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})
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})
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case *rtspformat.MPEG1Video:
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codec := &fmp4.CodecMPEG1Video{
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Config: formatprocessor.MPEG1VideoDefaultConfig,
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}
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track := addTrack(forma, codec)
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firstReceived := false
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var lastPTS int64
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f.ai.agent.Stream.AddReader(
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f.ai,
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media,
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forma,
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func(u unit.Unit) error {
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tunit := u.(*unit.MPEG1Video)
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if tunit.Frame == nil {
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return nil
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}
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randomAccess := bytes.Contains(tunit.Frame, []byte{0, 0, 1, 0xB8})
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if bytes.HasPrefix(tunit.Frame, []byte{0, 0, 1, 0xB3}) {
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end := bytes.Index(tunit.Frame[4:], []byte{0, 0, 1, 0xB8})
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if end >= 0 {
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config := tunit.Frame[:end+4]
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if !bytes.Equal(codec.Config, config) {
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codec.Config = config
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updateCodecs()
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}
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}
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}
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if !firstReceived {
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if !randomAccess {
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return nil
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}
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firstReceived = true
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} else if tunit.PTS < lastPTS {
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return fmt.Errorf("MPEG-1 Video streams with B-frames are not supported (yet)")
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}
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lastPTS = tunit.PTS
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return track.write(&sample{
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PartSample: &fmp4.PartSample{
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Payload: tunit.Frame,
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IsNonSyncSample: !randomAccess,
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},
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dts: tunit.PTS,
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ntp: tunit.NTP,
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})
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})
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case *rtspformat.MJPEG:
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codec := &fmp4.CodecMJPEG{
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Width: 800,
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Height: 600,
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}
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track := addTrack(forma, codec)
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parsed := false
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|
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f.ai.agent.Stream.AddReader(
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f.ai,
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media,
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forma,
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func(u unit.Unit) error {
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tunit := u.(*unit.MJPEG)
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if tunit.Frame == nil {
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return nil
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}
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if !parsed {
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parsed = true
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width, height, err := jpegExtractSize(tunit.Frame)
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if err != nil {
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return err
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}
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codec.Width = width
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codec.Height = height
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updateCodecs()
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}
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return track.write(&sample{
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PartSample: &fmp4.PartSample{
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Payload: tunit.Frame,
|
|
},
|
|
dts: tunit.PTS,
|
|
ntp: tunit.NTP,
|
|
})
|
|
})
|
|
|
|
case *rtspformat.Opus:
|
|
codec := &fmp4.CodecOpus{
|
|
ChannelCount: forma.ChannelCount,
|
|
}
|
|
track := addTrack(forma, codec)
|
|
|
|
f.ai.agent.Stream.AddReader(
|
|
f.ai,
|
|
media,
|
|
forma,
|
|
func(u unit.Unit) error {
|
|
tunit := u.(*unit.Opus)
|
|
if tunit.Packets == nil {
|
|
return nil
|
|
}
|
|
|
|
pts := tunit.PTS
|
|
|
|
for _, packet := range tunit.Packets {
|
|
err := track.write(&sample{
|
|
PartSample: &fmp4.PartSample{
|
|
Payload: packet,
|
|
},
|
|
dts: pts,
|
|
ntp: tunit.NTP.Add(timestampToDuration(pts, clockRate)),
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
pts += int64(opus.PacketDuration(packet)) * int64(clockRate) / int64(time.Second)
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
case *rtspformat.MPEG4Audio:
|
|
co := forma.GetConfig()
|
|
if co != nil {
|
|
codec := &fmp4.CodecMPEG4Audio{
|
|
Config: *co,
|
|
}
|
|
track := addTrack(forma, codec)
|
|
|
|
f.ai.agent.Stream.AddReader(
|
|
f.ai,
|
|
media,
|
|
forma,
|
|
func(u unit.Unit) error {
|
|
tunit := u.(*unit.MPEG4Audio)
|
|
if tunit.AUs == nil {
|
|
return nil
|
|
}
|
|
|
|
for i, au := range tunit.AUs {
|
|
pts := tunit.PTS + int64(i)*mpeg4audio.SamplesPerAccessUnit
|
|
|
|
err := track.write(&sample{
|
|
PartSample: &fmp4.PartSample{
|
|
Payload: au,
|
|
},
|
|
dts: pts,
|
|
ntp: tunit.NTP.Add(timestampToDuration(pts, clockRate)),
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
})
|
|
}
|
|
|
|
case *rtspformat.MPEG1Audio:
|
|
codec := &fmp4.CodecMPEG1Audio{
|
|
SampleRate: 32000,
|
|
ChannelCount: 2,
|
|
}
|
|
track := addTrack(forma, codec)
|
|
|
|
parsed := false
|
|
|
|
f.ai.agent.Stream.AddReader(
|
|
f.ai,
|
|
media,
|
|
forma,
|
|
func(u unit.Unit) error {
|
|
tunit := u.(*unit.MPEG1Audio)
|
|
if tunit.Frames == nil {
|
|
return nil
|
|
}
|
|
|
|
var dt time.Duration
|
|
|
|
for _, frame := range tunit.Frames {
|
|
var h mpeg1audio.FrameHeader
|
|
err := h.Unmarshal(frame)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if !parsed {
|
|
parsed = true
|
|
codec.SampleRate = h.SampleRate
|
|
codec.ChannelCount = mpeg1audioChannelCount(h.ChannelMode)
|
|
updateCodecs()
|
|
}
|
|
|
|
err = track.write(&sample{
|
|
PartSample: &fmp4.PartSample{
|
|
Payload: frame,
|
|
},
|
|
dts: tunit.PTS + tunit.PTS,
|
|
ntp: tunit.NTP,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
dt += time.Duration(h.SampleCount()) *
|
|
time.Second / time.Duration(h.SampleRate)
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
case *rtspformat.AC3:
|
|
codec := &fmp4.CodecAC3{
|
|
SampleRate: forma.SampleRate,
|
|
ChannelCount: forma.ChannelCount,
|
|
Fscod: 0,
|
|
Bsid: 8,
|
|
Bsmod: 0,
|
|
Acmod: 7,
|
|
LfeOn: true,
|
|
BitRateCode: 7,
|
|
}
|
|
track := addTrack(forma, codec)
|
|
|
|
parsed := false
|
|
|
|
f.ai.agent.Stream.AddReader(
|
|
f.ai,
|
|
media,
|
|
forma,
|
|
func(u unit.Unit) error {
|
|
tunit := u.(*unit.AC3)
|
|
if tunit.Frames == nil {
|
|
return nil
|
|
}
|
|
|
|
for i, frame := range tunit.Frames {
|
|
var syncInfo ac3.SyncInfo
|
|
err := syncInfo.Unmarshal(frame)
|
|
if err != nil {
|
|
return fmt.Errorf("invalid AC-3 frame: %w", err)
|
|
}
|
|
|
|
var bsi ac3.BSI
|
|
err = bsi.Unmarshal(frame[5:])
|
|
if err != nil {
|
|
return fmt.Errorf("invalid AC-3 frame: %w", err)
|
|
}
|
|
|
|
if !parsed {
|
|
parsed = true
|
|
codec.SampleRate = syncInfo.SampleRate()
|
|
codec.ChannelCount = bsi.ChannelCount()
|
|
codec.Fscod = syncInfo.Fscod
|
|
codec.Bsid = bsi.Bsid
|
|
codec.Bsmod = bsi.Bsmod
|
|
codec.Acmod = bsi.Acmod
|
|
codec.LfeOn = bsi.LfeOn
|
|
codec.BitRateCode = syncInfo.Frmsizecod >> 1
|
|
updateCodecs()
|
|
}
|
|
|
|
pts := tunit.PTS + int64(i)*ac3.SamplesPerFrame
|
|
|
|
err = track.write(&sample{
|
|
PartSample: &fmp4.PartSample{
|
|
Payload: frame,
|
|
},
|
|
dts: pts,
|
|
ntp: tunit.NTP.Add(timestampToDuration(pts, clockRate)),
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
case *rtspformat.G722:
|
|
// TODO
|
|
|
|
case *rtspformat.G711:
|
|
codec := &fmp4.CodecLPCM{
|
|
LittleEndian: false,
|
|
BitDepth: 16,
|
|
SampleRate: forma.SampleRate,
|
|
ChannelCount: forma.ChannelCount,
|
|
}
|
|
track := addTrack(forma, codec)
|
|
|
|
f.ai.agent.Stream.AddReader(
|
|
f.ai,
|
|
media,
|
|
forma,
|
|
func(u unit.Unit) error {
|
|
tunit := u.(*unit.G711)
|
|
if tunit.Samples == nil {
|
|
return nil
|
|
}
|
|
|
|
var out []byte
|
|
if forma.MULaw {
|
|
out = g711.DecodeMulaw(tunit.Samples)
|
|
} else {
|
|
out = g711.DecodeAlaw(tunit.Samples)
|
|
}
|
|
|
|
return track.write(&sample{
|
|
PartSample: &fmp4.PartSample{
|
|
Payload: out,
|
|
},
|
|
dts: tunit.PTS,
|
|
ntp: tunit.NTP,
|
|
})
|
|
})
|
|
|
|
case *rtspformat.LPCM:
|
|
codec := &fmp4.CodecLPCM{
|
|
LittleEndian: false,
|
|
BitDepth: forma.BitDepth,
|
|
SampleRate: forma.SampleRate,
|
|
ChannelCount: forma.ChannelCount,
|
|
}
|
|
track := addTrack(forma, codec)
|
|
|
|
f.ai.agent.Stream.AddReader(
|
|
f.ai,
|
|
media,
|
|
forma,
|
|
func(u unit.Unit) error {
|
|
tunit := u.(*unit.LPCM)
|
|
if tunit.Samples == nil {
|
|
return nil
|
|
}
|
|
|
|
return track.write(&sample{
|
|
PartSample: &fmp4.PartSample{
|
|
Payload: tunit.Samples,
|
|
},
|
|
dts: tunit.PTS,
|
|
ntp: tunit.NTP,
|
|
})
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(setuppedFormats) == 0 {
|
|
f.ai.Log(logger.Warn, "no supported tracks found, skipping recording")
|
|
return
|
|
}
|
|
|
|
n := 1
|
|
for _, medi := range f.ai.agent.Stream.Desc().Medias {
|
|
for _, forma := range medi.Formats {
|
|
if _, ok := setuppedFormatsMap[forma]; !ok {
|
|
f.ai.Log(logger.Warn, "skipping track %d (%s)", n, forma.Codec())
|
|
}
|
|
n++
|
|
}
|
|
}
|
|
|
|
f.ai.Log(logger.Info, "recording %s",
|
|
defs.FormatsInfo(setuppedFormats))
|
|
}
|
|
|
|
func (f *formatFMP4) close() {
|
|
if f.currentSegment != nil {
|
|
for _, track := range f.tracks {
|
|
if track.nextSample != nil &&
|
|
timestampToDuration(track.nextSample.dts, int(track.initTrack.TimeScale)) > f.currentSegment.lastDTS {
|
|
f.currentSegment.lastDTS = timestampToDuration(track.nextSample.dts, int(track.initTrack.TimeScale))
|
|
}
|
|
}
|
|
|
|
f.currentSegment.close() //nolint:errcheck
|
|
}
|
|
}
|